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<?php
class Relive extends ModelBase
{
public function isEnabled()
{
// having CONFERENCE.RELIVE is not enough!
return $this->has('CONFERENCE.RELIVE_JSON');
}
public function getJsonUrl()
{
return $this->get('CONFERENCE.RELIVE_JSON');
}
public function getTalks()
{
if($talks_by_id = $this->getCached())
return $talks_by_id;
$talks = file_get_contents($this->getJsonUrl());
$talks = utf8_decode($talks);
$talks = (array)json_decode($talks, true);
usort($talks, function($a, $b) {
$sort = array('live', 'recorded', 'released');
return array_search($a['status'], $sort) > array_search($b['status'], $sort);
});
$talks_by_id = array();
foreach ($talks as $talk)
{
if($talk['status'] == 'released')
$talk['url'] = $talk['release_url'];
else
$talk['url'] = 'relive/'.rawurlencode($talk['id']).'/';
$talks_by_id[$talk['id']] = $talk;
}
return $this->doCache($talks_by_id);
}
public function getTalk($id)
{
$talks = $this->getTalks();
if(!isset($talks[$id]))
throw new NotFoundException('Relive-Talk id '.$id);
return $talks[$id];
}
private function isCacheEnabled()
{
return $this->has('CONFERENCE.RELIVE_JSON_CACHE') && function_exists('apc_fetch') && function_exists('apc_store');
}
private function getCacheDuration()
{
return $this->get('CONFERENCE.RELIVE_JSON_CACHE', 60*10 /* 10 minutes */);
}
private $localCache = null;
private function getCached()
{
if($this->localCache)
return $this->localCache;
if(!$this->isCacheEnabled())
return null;
return apc_fetch($this->getCacheKey());
}
private function doCache($value)
{
$this->localCache = $value;
if(!$this->isCacheEnabled())
return $value;
apc_store($this->getCacheKey(), $value, $this->getCacheDuration());
return $value;
}
private function getCacheKey()
{
return 'RELIVE.'.$this->getJsonUrl();
}
}
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